Impedance mismatch between two pieces of equipment (amplifier and speaker, in this case) is a thing, and depending on how the amplifier is built can be a problem. But for the piece of wire connecting them to behave like a transmission line it needs to be a significant fraction of the wavelength of the signal, which at audio frequency is quite a lot, so unless you have your amplifier on the other side of town it is totally irrelevant. The guy was blabbing nonsense. We didn't talk about quarks.
Once someone tried to tell me that the wrong cable impedance to the speakers affected sound. Asked him what is the wavelength at audio frequencies, conversation died.
In addition to all the good suggestions already here, consider installing early-oom and configure it to kill the stuff you care less, maybe one of those heavy electron-based clients.
Nice, I got myself the over the ear momentum 4, along with the BT dongle. Was almost ready to return it, because of shitty audio when playing music on the computer. Instead all that was necessary to do was setting the profile to audio output only. If it is set to output+input (i.e. with the microphone on) it defaults to phone call quality. Properly set it sounds very good.
The only downside is that guess where they made...?
This is one of the most useful things in Xorg, and prior to that in X11. If you (generic you, not anyone in particular here) don't know about it it's because you come from too long time on "my users are stupid" operating systems. It's one of those things that once you have it in muscle memory you use it without even thinking about it.
Have I mis-pasted things? Yes. Have l pasted my password in an IRC channel? Yes. Would I stop using it because once every few months I make a mistake? Not at all.
Make it configurable, if you must, but leave us old timers work the way we have done for 30 years or more. There are already some software/ toolkits that disable it, so it is likely doable on a per-app basis.
Gratuitous "old man yells at clouds" rant: people should be forced to use a VT52 for one year before being granted GUI privileges, especially if you work with network hardware.
Small form factor, or something like that . Little motherboard possibly fanless, space for one or maybe 2 2.5 hd. The little thing you can use for a nice video player at home or the cash register at work
Beatrix Potter, maybe?